Legislative Scorecards: How much value can voters place on these kinds of ratings? Al Pereira/WireImage/Getty Images Singer Jennifer Hudson joins the Sandy Hook Elementary School chorus at the Super Bowl to sing America the Beautiful. Hudsons appearance with the children demonstrated her support for stronger gun control legislation. Dusit/Shutterstock.com Click picture to view video 1.What types of interest groups are represented by the protestors? 2.What does collective bargaining mean? Are states legally obligated to meet pension and other commitments to public employees? 3.Do you think this demonstration is a successful strategy?